Probably the greatest UX innovation in microwaves I've noticed is the "start now for 30 seconds and keep adding 30 seconds every time I press this" button. Wan

Probably the greatest UX innovation in microwaves I've noticed is the "start now for 30 seconds and keep adding 30 seconds every time I press this" button. Want 90 seconds? Press the button 3 times. Want 5.5 minutes? Keep pressing the button until the display says you're there. That way there's no confusion about what 120 means. For one thing, the difference between 20 seconds and 30 seconds is negligible, so might as well only work in half-minute increments in the first place.